How to Create a hotkey in MFC

First, use the MFC Application Wizard to generate a dialog box-based application.

 

Then, register the hotkey in the OnInitDialog member function of the dialog box class.

: RegisterHotKey (m_hWnd, 001, MOD_ALT, VK_ESCAPE );

: Global identifier;

M_hwnd dialog box handle;

001 hotkey ID, which is an integer value and can be defined at will or by a macro;

MOD_ALT indicates that it is triggered by the combination key (ALT + VK). The optional values include MOD_SHIFT, MOD_WIN, and MOD_NOREPEAT. If it is set to NULL, the combination key is not used;

VK_ESCAPE is the virtual key code of the hotkey, which can be defined as needed. In this example, use the ESC key in the upper left corner of the keyboard.

 

Next, reload the PreTranslateMessage function (Note: This function cannot intercept messages sent by the SendMessage function ).

In VC6.0, right-click the dialog box class in the Class View and select Add virtual Function. Select PreTranslateMessage and reload it.

 

Finally, enter the following code in the function body to enable the pop-up message box function after pressing the hot key.

Switch (pMsg-> message)
{
Case WM_HOTKEY:
If (001 = pMsg-> wParam) MessageBox ("Welcome tohttp: // hi.baidu.com/darks00n /");
Break;
Default:
Break;
}

Message is a member of the MSG message structure, representing the message type. The message type of the hotkey is WM_HOTKEY.

WParam is an additional parameter. When this parameter value is equal to 001, our hotkeys are triggered. Multiple hotkeys are distinguished by this parameter.

 

OK! Press ALT + ESC at the same time after F5 executes the program. The message box is displayed successfully. Is it so easy to create a hotkey under MFC?

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